923ddf65f4
As of now, we only check if a class directly inherits from NSObject to determine if said class has fixed offsets and can therefore "opt-out" from the non-fragile ABI for ivars. However, if an NSObject subclass has fixed offsets, then so must the subclasses of that subclass, so this allows us to optimize instances of subclasses of subclasses that inherit from NSObject and so on. To determine this, we need to find that the compiler can see the implementation of each intermediate class, as that means it is statically linked. Fixes: #81369
141 lines
4.5 KiB
Objective-C
141 lines
4.5 KiB
Objective-C
// RUN: %clang_cc1 -triple x86_64-apple-macosx10.14.0 -emit-llvm %s -o - | FileCheck %s
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// CHECK: @"OBJC_IVAR_$_StaticLayout.static_layout_ivar" = hidden constant i64 20
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// CHECK: @"OBJC_IVAR_$_SuperClass.superClassIvar" = hidden constant i64 20
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// CHECK: @"OBJC_IVAR_$_SuperClass._superClassProperty" = hidden constant i64 24
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// CHECK: @"OBJC_IVAR_$_IntermediateClass.intermediateClassIvar" = constant i64 32
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// CHECK: @"OBJC_IVAR_$_IntermediateClass.intermediateClassIvar2" = constant i64 40
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// CHECK: @"OBJC_IVAR_$_IntermediateClass._intermediateProperty" = hidden constant i64 48
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// CHECK: @"OBJC_IVAR_$_SubClass.subClassIvar" = constant i64 56
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// CHECK: @"OBJC_IVAR_$_SubClass._subClassProperty" = hidden constant i64 64
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// CHECK: @"OBJC_IVAR_$_NotStaticLayout.not_static_layout_ivar" = hidden global i64 12
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@interface NSObject {
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int these, will, never, change, ever;
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}
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@end
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@interface StaticLayout : NSObject
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@end
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@implementation StaticLayout {
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int static_layout_ivar;
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}
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// CHECK-LABEL: define internal void @"\01-[StaticLayout meth]"
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-(void)meth {
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static_layout_ivar = 0;
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// CHECK-NOT: load i64, ptr @"OBJC_IVAR_$_StaticLayout
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// CHECK: getelementptr inbounds i8, ptr %0, i64 20
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}
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@end
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@interface SuperClass : NSObject
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@property (nonatomic, assign) int superClassProperty;
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@end
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@implementation SuperClass {
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int superClassIvar; // Declare an ivar
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}
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// CHECK-LABEL: define internal void @"\01-[SuperClass superClassMethod]"
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- (void)superClassMethod {
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_superClassProperty = 42;
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superClassIvar = 10;
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// CHECK-NOT: load i64, ptr @"OBJC_IVAR_$_SuperClass
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// CHECK: getelementptr inbounds i8, ptr %1, i64 20
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}
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// Implicitly synthesized method here
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// CHECK-LABEL: define internal i32 @"\01-[SuperClass superClassProperty]"
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// CHECK: getelementptr inbounds i8, ptr %0, i64 24
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// CHECK-LABEL: define internal void @"\01-[SuperClass setSuperClassProperty:]"
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// CHECK: getelementptr inbounds i8, ptr %1, i64 24
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@end
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@interface IntermediateClass : SuperClass {
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double intermediateClassIvar;
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@protected
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int intermediateClassIvar2;
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}
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@property (nonatomic, strong) SuperClass *intermediateProperty;
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@end
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@implementation IntermediateClass
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@synthesize intermediateProperty = _intermediateProperty;
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// CHECK-LABEL: define internal void @"\01-[IntermediateClass intermediateClassMethod]"
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- (void)intermediateClassMethod {
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intermediateClassIvar = 3.14;
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// CHECK-NOT: load i64, ptr @"OBJC_IVAR_$_IntermediateClass
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// CHECK: getelementptr inbounds i8, ptr %0, i64 32
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}
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// CHECK-LABEL: define internal void @"\01-[IntermediateClass intermediateClassPropertyMethod]"
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- (void)intermediateClassPropertyMethod {
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self.intermediateProperty = 0;
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// CHECK: load ptr, ptr @OBJC_SELECTOR_REFERENCES_
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// CHECK: call void @objc_msgSend(ptr noundef %0, ptr noundef %1, ptr noundef null)
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}
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// CHECK-LABEL: define internal void @"\01-[IntermediateClass intermediateClassPropertyMethodDirect]"
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- (void)intermediateClassPropertyMethodDirect {
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_intermediateProperty = 0;
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// CHECK-NOT: load i64, ptr @"OBJC_IVAR_$_IntermediateClass._intermediateProperty"
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// CHECK: getelementptr inbounds i8, ptr %0, i64 48
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}
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@end
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@interface SubClass : IntermediateClass {
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double subClassIvar;
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}
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@property (nonatomic, assign) SubClass *subClassProperty;
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@end
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@implementation SubClass
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// CHECK-LABEL: define internal void @"\01-[SubClass subclassVar]"
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- (void)subclassVar {
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subClassIvar = 6.28;
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// CHECK-NOT: load i64, ptr @"OBJC_IVAR_$_SubClass
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// CHECK: getelementptr inbounds i8, ptr %0, i64 56
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}
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// CHECK-LABEL: define internal void @"\01-[SubClass intermediateSubclassVar]"
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-(void)intermediateSubclassVar {
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intermediateClassIvar = 3.14;
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// CHECK-NOT: load i64, ptr @"OBJC_IVAR_$_IntermediateClass
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// CHECK: getelementptr inbounds i8, ptr %0, i64 32
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}
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// Implicit synthesized method here:
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// CHECK-LABEL: define internal ptr @"\01-[SubClass subClassProperty]"
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// CHECK-NOT: load i64, ptr @"OBJC_IVAR_$_SubClass._subClassProperty"
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// CHECK: getelementptr inbounds i8, ptr %0, i64 64
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// CHECK-LABEL: define internal void @"\01-[SubClass setSubClassProperty:]"
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// CHECK-NOT: load i64, ptr @"OBJC_IVAR_$_SubClass._subClassProperty"
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// CHECK: getelementptr inbounds i8, ptr %1, i64 64
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@end
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@interface NotNSObject {
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int these, might, change;
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}
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@end
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@interface NotStaticLayout : NotNSObject
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@end
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@implementation NotStaticLayout {
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int not_static_layout_ivar;
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}
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// CHECK-LABEL: define internal void @"\01-[NotStaticLayout meth]"
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-(void)meth {
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not_static_layout_ivar = 0;
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// CHECK: load i64, ptr @"OBJC_IVAR_$_NotStaticLayout.not_static_layout_ivar
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}
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@end
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